Disc harrow blade



FIG. 1 is a front isometric view of the disc harrow blade;

FIG. 2 is a rear isometric view of the disc harrow blade;

FIG. 3 is a top view of the disc harrow blade; and,

FIG. 4 is a side view of the disc harrow blade. 

CLAIM The ornamental design for the disc harrow blade, as shown and described. 